<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="an-title">后台管理系统登录</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon
            :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"
          />
        </span>
      </el-form-item>

      <el-form-item prop="code">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input v-model="loginForm.code" placeholder="请输入右侧验证码" />
        <div class="code" @click="refreshCode">
          <identify
            :identify-code="identifyCode"
            :content-height="identifyHeigh"
            :content-width="contentWidth"
          />
        </div>
      </el-form-item>

      <el-button
        :loading="loading"
        type="primary"
        style="width: 100%; margin-bottom: 30px"
        @click.prevent="handleLogin"
        >登 录</el-button
      >
    </el-form>
  </div>
</template>

<script>
import identify from "./identify/identify.vue";
import md5 from "js-md5";
import { mapActions } from "vuex";

export default {
  name: "Login",
  components: {
    identify,
  },
  data() {
    const validatePassword = (rule, value, callback) => {
      if (!value) {
        callback(new Error("请输入密码"));
      } else {
        callback();
      }
    };
    const validateCode = (rule, value, callback) => {
      if (value !== this.identifyCode) {
        callback(new Error("验证码不正确！"));
      } else {
        callback();
      }
    };
    return {
      loginForm: {
        username: "",
        password: "",
        code: "",
      },
      loginRules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
        ],
        password: [
          { required: true, trigger: "blur", validator: validatePassword },
        ],
        code: [{ required: true, trigger: "blur", validator: validateCode }],
      },
      loading: false,
      passwordType: "password",
      redirect: undefined,
      identifyCodes: "1234567890",
      identifyCode: "", // 4位数验证码
      identifyHeigh: 47,
      contentWidth: 160,
    };
  },
  watch: {
    $route: {
      handler: function (route) {
        this.redirect = route.query && route.query.redirect;
      },
      immediate: true,
    },
  },
  mounted() {
    this.refreshCode();
    if (process.env.NODE_ENV === "development") {
      // 开发模式
      this.loginForm.code = this.identifyCode; // 自动填充验证码
    }
  },
  methods: {
    ...mapActions("userModule", ["login"]),
    showPwd() {
      if (this.passwordType === "password") {
        this.passwordType = "";
      } else {
        this.passwordType = "password";
      }
      this.$nextTick(() => {
        this.$refs.password.focus();
      });
    },

    // 登录
    handleLogin() {
      this.$refs["loginForm"].validate((valid) => {
        if (valid) {
          this.loading = true;
          const nd = {
            username: this.loginForm.username,
            password: md5(this.loginForm.password),
          };
          this.login(nd)
            .then(() => {
              // this.$router.push({ path: this.redirect || '/' })
              this.$router.push({ path: "/" });
              this.loading = false;
            })
            .catch(() => {
              this.loading = false;
            });
        } else {
          console.log("error submit!!");
          this.refreshCode();
          return false;
        }
      });
    },

    refreshCode() {
      // 刷新验证码
      this.identifyCode = "";
      this.makeCode(this.identifyCodes, 4);
    },
    makeCode(o, l) {
      // 生成二维码
      for (let i = 0; i < l; i++) {
        this.identifyCode += this.identifyCodes[
          this.randomNum(0, this.identifyCodes.length)
        ];
      }
    },
    randomNum(min, max) {
      // 生成随机数字
      return Math.floor(Math.random() * (max - min) + min);
    },
  },
};
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}
/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .an-title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
      background-image: linear-gradient(
        0deg,
        rgb(255, 255, 255),
        rgb(221, 221, 221)
      );
      background-clip: text;
      letter-spacing: 3px;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
  .code {
    width: 160px;
    height: 47px;
    position: absolute;
    right: 0;
    top: 0;
  }
}
</style>
